extern unsigned long int hhmmsstt2ms(char* hhmmsstt);
extern unsigned long int rtime(char* nmeastr);
extern double latitude(char* nmeastr);
extern double longitude(char* nmeastr);
extern double distance(double latA, double lonA, double hA, double latB, double lonB, double hB);
extern double direction(double latA, double lonA, double latB, double lonB);